The Multiquip 12311ZJ1840 Head Cover GX670 HC- is a genuine OEM component designed for AR13HA, AR13H, AR13HC asphalt ride-on rollers and the GA9.7HE gasoline-powered generator. Sourced directly from Multiquip, this part carries the same specifications as the original, ensuring a correct, hassle-free installation every time. It is confirmed compatible across the AR13 roller series and the GA9.7HE, making 12311ZJ1840 a straightforward choice when sourcing a direct replacement.
Key Features
- Genuine OEM Construction — Manufactured to the exact material thickness and sealing geometry of the original GX670 engine head cover, so compression and oil retention characteristics are preserved.
- Direct-Fit Replacement — Mounts to the GX670 engine using the original bolt pattern and gasket interface, requiring no rework of the mounting surface or hardware.
- Broad Fitment Across AR13 Rollers and GA9.7HE — Compatible with AR13HA, AR13HAR, AR13H, and AR13HC ride-on rollers as well as the GA9.7HE gasoline-powered generator, covering a wide share of GX670-equipped Multiquip equipment.
- Engine Integrity Protection — A properly sealed head cover keeps oil vapors contained and contaminants out of the valve train, directly supporting consistent engine power and long service intervals.
- Verified OEM Part Number — Part number 12311ZJ1840 matches the Multiquip OEM catalog for the HC-6223887 reference, giving you confidence you are ordering the right component before it ships.
The head cover seals the top of the engine's cylinder head, enclosing the valve train and rocker arm assembly. It prevents oil from escaping the valve chamber and stops dirt, moisture, and debris from entering an area where even minor contamination can cause accelerated wear. When the head cover cracks, warps, or its gasket fails, oil leaks onto hot engine surfaces — creating smoke, potential fire risk, and progressive oil loss that can lead to engine damage if left unaddressed. Replacing a worn or damaged cover promptly keeps the GX670 engine running cleanly and protects the components it encloses.
Part Details
| Part Number | 12311ZJ1840 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Head Cover GX670 HC-6223887 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Rollers | AR13HA/HAR |
| Rollers | AR13H |
| Rollers | AR13HC |
| Gasoline Powered Generators | GA9.7HE |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
